Awww... what a complete sweetie!

I'd still use the clay a while longer, especially seeing how long her hair is (lots to get clumped and tangled in). How about just dumping it nightly, and refilling it with new litter every day? It does cut down on the smell that way. Try the supermarket's generic brand - SO much cheaper than Tidy Cats Clay and I've actually noticed its less dusty because they don't add all the perfumy stuff to it.